<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>案例</title>
    <style>
        .nan a {
            display: inline-block;
            height: 58px;
            width: 120px;
            text-align: center;
            line-height: 58px;
            color: seashell;
            text-decoration: none;

        }

        .nan .bg1 {
            background: url(../11/tp/2) no-repeat;
        }

        .nan .bg1:hover {
            background-image: url(../11/tp/3);
        }

        .nan .bg2 {
            background: url(../11/tp/3) no-repeat;
        }

        .nan .bg2:hover {
            background-image: url(../11/tp/4);
        }

        .nan .bg3 {
            background: url(../11/tp/2) no-repeat;
        }

        .nan .bg3:hover {
            background-image: url(../11/tp/3);
        }

        .nan .bg4 {
            background: url(../11/tp/4) no-repeat;
        }

        .nan .bg4:hover {
            background-image: url(../11/tp/5);
        }
    </style>
</head>

<body>
    <div class="nan">
        <a href="#" class="bg1">彩色导航</a>
        <a href="#" class="bg2">彩色导航</a>
        <a href="#" class="bg3">彩色导航</a>
        <a href="#" class="bg4">彩色导航</a>
        <a href="#" class="bg5">彩色导航</a>
    </div>
</body>

</html>